Distributor of liquids



J. SCHNEEWEISS. DISTRIBUTOR 0F uoums. APPLICATION FILED SEPT. 3, 1921.

Patented 0017-1@,1922;

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Patented ct, lid, 12%,,

'JOHANN $CHNEEWEISS, 0F BERLIll-WANN SEE, GERMANY, ASSIGNOR T0 REKOJRDOELER GESELLSCHAFT MIT BESCHRANKTEB HAFTUNG, OF BERLIN-SCIIQENEBERG,

GERMANY.

DISTRIBUTOR 0F LIQUIDS.

Application filed September 3, 1921. Serial No. 498,583.

(GRANTED UNDER THE I'RO'VISIONS OF THE ACT OF MARCH 3, 1921, 4L1 STAT.L, 1313.)

T0 alt whom is may concern:

Be it known that I, JOI-IANN Sormnnwniss, of 8 Tristanstrasse, Berlin-lVannsee, Gen many, a subject of the German Republic, have invented anewand useful Improve ment in Distributors of Liquids (for which I havefiled applications as follows: in Germany May15, 1914, Patent No.319,724, and n Great Britain July 8, 1914:, Patent No. 165%), of whichthe following is a specification. 1 v

The present invention relates to distributors of liquid of the kind inwhich arotatable valve member contained within casing androtated bysuitable gear is. provided with a piston or pistons adapted to efi'ect astroke in one direction under the action of springs and to make thereturn stroke by engagement with a cam track which inay be. formed as aplane surface, such as an end face of the casing, and a seriesofadjustable pins or screws projecting into the path of the piston orpistons as the rotatable valve member rotates.

The invention has for its object to pro- 'vide improved andsimplifiedcons ructions of such a distributor. i

According to the invention the distributor comprises, in combination, acasing carrying in one end a number of adjustable cams, screws or thelike, a removable end plate in which is secured a centrally disposedshaft or spindle, a cylindrical valve body fitted rotatably within thecasing upon the shaft or spindle and provided with gear teeth around theperiphery and one or more piston chambers sufficiently long to allowpis+ tons to reciprocate therein, one or more headed pistons disposed inthe said piston chambers and each carrying a spring disposed between thehead and a shoulder provided inthepiston chamber, the heads of thepistons being formed or provided for engagement with the cam studs orthe like, a gear slot in the casing in the plane of the gear teeth ofthe valve body, a gear or like wheel projecting through the said gearslot for engagement with the valve body and carried by a shaft exteriorto the casing, inlet ports in the removable end plate and means toeffect communication between the piston chambers and the inlet ports andwith discharge ports.

(/onstructions of such a distributor are hereinafter described withreference to the accompanying drawings.

Figure 1 represents in section. a construc tion of theidistributorserving for the distribution of one liquid only. i

Figure 2 is a development of a diagram matic cylindrical section takenthrough the cam screws m shown in Figure 1.

Figure 3 is a diagram illustrative of the operation of a distributoradapted, for or ample, to distribute three different kinds of liquids,the sections being taken on the lines of the suction ports and thedevelopments representing three cylindrical surfaces or sections.

Figures a and 5 represent respectively, in cross section and elevationpartly in section, a modified construction of the distributor.

The distributor represented in Figure 1 comprises a cylindrical casing ain which a rotary valve 3 is rotatably mounted upon the shank of thecentrally disposed screw 1).

The piston 72 is fitted to reciprocate in a bore formed in the rotaryvalve 8, and carries at one end, within, a portion of the bore ofenlarged diameter, a socket adapted to receive ball, roller or the likea". A spring 7'' tends to bring the piston always to the bepinning ofthe discharge position or to force it with the ball 1", held in thesocket, against the front wall (Z of the casing a. The cam screws m arearranged in a circular line in the front-wall (Z and project with theirrounded ends inside the casing, according to the desired stroke of: thepiston, and the ball r, being guided on the same circular line, mustnecessarily pass, during the rotation of the valve 8, along the camtrack formed by thefront-wall d and the cam screwsm. The cam track onthe one hand and the spring on, the other hand are, thus,

the means by which the piston is is reciprocated. As the cam screws mare adjustable, the stroke of the piston can be varied during theoperation, for each cam screw. The valve .9 is rotated by a toothed,helicoidal or like pinion, as shown in the drawings.

The operation of the distributor provided with one piston is as followshen the valve .9 is set working, and stands, for instance, according toFig. 2, with the piston in position l, the piston has finished thedischarge stroke, due to the passage of the ball r to the end of a camscrew m. During the period of discharge the channel. 2' has communicatedwith one of the discharge openings 0, and the liquid has been forced toescape, by reason of the pressure exerted by the piston. Position 11 ofthe piston shows the suction stroke completed. As soon as the ball 9*begins to move towards the front wall (Z of the casing one ofthe'suction ports a communicates with the suction-chamber g of thevalve, and the liquid is free to enter. Before the period of dischargeagain begins, as in position III of Fig. 2, the suction port has beenpassed and is shut off. The transition from the dis charge stroke to thesuction stroke of the piston takes place between the positions IV and V.

According to Fig. 1, the discharge openings are arranged around thewhole casing in two rows in which they are alternately placed; they maybe distributed over more than two rows, as required.

Fig. 3 illustrates diagrammatically the operation of a distributor,provided with 3 pistons, which may conveniently be arranged at differentradial distances from the axis of the casing a, the corresponding camscrews and suction ports being arranged accordingly. The operation inrespectto each piston is in details just as hereinbefore described. Thesuction ports for each kind of liquid, A, B and C, are disposedalternately, just as are the discharge openings.

Figures 4 and 5 show another form of construction; in this case thepiston 70 works in the radial direction of the rotary valve and theadjustable cam track is formed, as is shown here, by way of example, bypins, rollers or the like h, adapted to be adjusted in grooves. Thepiston 70 in the position represented in Figure 4 is about to pass fromthe suction to the discharge stroke. The suction-ports n and thedischarge-openings 0 lead through the front cover or Wall p.

Fig. 5 shows the distributing conduit provided with a control-cock t.

Having now particularly described and ascertained the nature of my saidinvention and in what mannerthe same is to be performed, I declare thatwhat I claim is:

l. A liquid distributor comprising, a casing having inlets and outlets,a. rotatable valve located in said casing. one or more pistons locatedto reciprocate in said valve, and means for reciprocating them. saidmeans comprising a cam track having :uljustable projections thereinlocated in the path of a piston and adapted to engage it whereby thethrow of the piston may be adjusted.

2. A liquid distributor comprising, a casing having inlets and outlets,a rotatable valve located in said casing, one or more pistons located toreciprocate in said valve, and means for reciprocating them, said meanscomprising a cam track having adjustable projections therein located inthe path of said pistons and adapted to ngage them whereby the throw ofthe pistons may be adjusted, and means for holding each piston againstsaid cam track and projections.

3. A liquid distributi'ir comprising, a casing having inlets andoutlets, a rotatable valve located in said casing, one or more pistonslocated to reciprocate in said valve, and means for reciprocating them,said means comprising a cam track having adjustable projections thereinlocated in the path of said pistons and adapted to engage them wherebythe throw of the pistons may be adjusted, sa'id projections beinglocated with relation to each outlet whereby the amount of liquidexpelled from each outlet may be regulated by adjusting the throw of thepistons.

4. A distributor of the kind described comprising a casing closed atboth ends, the inner surface of one closure being camlike and comprisinga plurality of screws, a shaft mounted in the other closure, acylindrical valve fitted within said casing and mounted to turn on saidshaft, said valve having gear teeth about its periphery and one or morepiston chambers within it, a piston located in each chamber to engagesaid camlike surface, and yielding means to hold said pistons againstsaid camlike surface, a gear slot in said casing, a pinion mountedoutside said casing and located to engage said gear teeth and rotatesaid valve, said casing being provided with inlet and discharge ports,and means adapted to connect said piston chambers with said inlet anddischarge ports alternately.

The foregoing specification signed at Berlin this eighteenth day ofAugust, 1921.

J OHANN SCHNEEVEISS.

